@article{10_4171_ggd_365,
     author = {Justin Malestein and Andrew Putman},
     title = {Pseudo-Anosov dilatations and the {Johnson} filtration},
     journal = {Groups, geometry, and dynamics},
     pages = {771--793},
     year = {2016},
     volume = {10},
     number = {2},
     doi = {10.4171/ggd/365},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/365/}
}